Fastening device



FIG. 1 is an upper perspective view of the new design;

FIG. 2 is a lower perspective view thereof;

FIG. 3 is a side view thereof, the opposite side being a mirror image;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is bottom view thereof.

CLAIM The ornamental design for a fastening device, as shown anddescribed.